Electrons in feldspar II: A consideration of the influence of conduction band-tail states on luminescence processes

H.R.J. Poolton, K.B. Ozanyan, J. Wallinga, A.S. Murray, L. Bøtter-Jensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Most natural feldspars contain many charged impurities, and display a range of bond angles, distributed about the ideal. These effects can lead to complications in the structure of the conduction band, giving rise to a tail of energy states (below the high-mobility conduction band) through which electrons can travel, but with reduced mobility: transport through these states is expected to be thermally activated. The purpose of this article is twofold. Firstly, we consider what kind of lattice perturbations could give rise to both localized and extended conduction band-tail states. Secondly. we consider what influence the band tails have on the luminescence properties of feldspar, where electrons travel through the sample prior to recombination. The work highlights the dominant role that 0.04-0.05-eV phonons play in both the luminescence excitation and emission processes of these materials. It also has relevance in the dating of feldspar sediments at elevated temperatures.
    Original languageEnglish
    JournalPhysics and Chemistry of Minerals
    Volume29
    Issue number3
    Pages (from-to)217-225
    ISSN0342-1791
    DOIs
    Publication statusPublished - 2002

    Fingerprint Dive into the research topics of 'Electrons in feldspar II: A consideration of the influence of conduction band-tail states on luminescence processes'. Together they form a unique fingerprint.

    Cite this